Space View, a provider of Chinese EO satellite data services, is also monitoring the mega-bridge and put together an impressive timeline of how the bridge's west man made island has developed since work began in 2011.

Benefit from its features of large coverage and multi-revisit, satellite remote sensing is one of the best tools to monitor the progress of large construction works on our Globe. The animated images show the Brdige's west man-made island which has grown from nothing. pic.twitter.com/n7C1L7E8W4

The HZMB bridge features six lanes and four tunnels – one of which is underwater, as well as four artificial islands to support the structure.

It is roughly 20 times longer than the Golden Gate Bridge and will take the title of the world's longest bridge over water from another Chinese structure – the Jiaozhou Bay Bridge in eastern China's Shandong province.

After seven years of construction and a controversial cost, which local outlets report is in the region of $15 billion, the Hong Kong-Zhuhai-Macau Bridge Authority is offering assurances that the structure is stable and will hold steady for at least 120 years.